1
$\begingroup$

Hello everyone and good day to you,

Could you please explain how to use principal components in principal component analysis in a correlation analysis? I performed a PCA on my dataset and extracted 2 components form 8 variables; Now I'm wondering how to use pearson or spearman correlation analysis to find out the correlation between PC1(or PC2) and, let's say, another variable.

I mean, I want to do a regression analysis in which my two extracted components are independent variables and each participant's age (for example) is the dependent variable.

How should I do this?

Many thanks.

Improve this question
$\endgroup$

1 Answer 1

Reset to default
1
$\begingroup$

If I am understanding you correctly, I think you would just perform correlation or regression analysis as you would with any other set of variables, only now you use the principal components (the data projected onto the 2 selected principal component directions) as your variables.

Here is a good, short article that describes performing regression with principal components:

https://online.stat.psu.edu/stat508/lesson/7/7.1

Hope that helps!

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.